Update README.md

Author: peterszatmary

README.md

@@ -140,13 +140,19 @@ Method of software testing which involves modifying programs' source code or byt
 
 ### Load testing ###
 
-- [Gatling]()
-- [Apache JMeter]()
+- [Gatling](https://gatling.io)
+- [Apache JMeter](https://jmeter.apache.org)
 
 ### Performance testing ###
 
-- [Gatling]()
-- [Apache JMeter]()
+- [Gatling](https://gatling.io)
+- [Apache JMeter](https://jmeter.apache.org)
+
+### Endurance Testing ### 
+- Type of testing which checks for memory leaks or other problems that may occur with prolonged execution. It is usually performed by performance engineers.
+
+- [Apache JMeter](https://jmeter.apache.org)
+- [Gatling](https://gatling.io)
 
 ### UI testing ###